Question: Is the caliber standard of Roots blower based on outlet caliber or import caliber?
Answer: The diameter standard of a Roots blower is the diameter of the air outlet. The air inlet should be smaller than the air outlet. For example, the diameter of the air outlet is and the diameter of the air inlet is. The number behind the general three-blade Roots blower model is The diameter of the air outlet.
Ask how to reduce the outlet temperature of Roots blower?
Answer The factors that affect the outlet temperature of the three-blade Roots blower mainly include the volumetric efficiency of the fan, the working pressure, the internal leakage of the fan, and the temperature of the suction air.
Some of the above factors have been finalized once the fan is formed, and they have a lot to do with the technical level of the fan manufacturer. What we can do is to reduce the outlet pressure, reduce the suction air temperature, or think of reducing the outlet temperature through other methods. In many cases, the outlet pressure of sewage treatment plants cannot be reduced due to process limitations.
You can start from the following aspects
If the fan is installed indoors. Air conditioning can be installed if possible. Don't regret the air conditioning and electricity bills. Because every time the temperature of the motor increases, the lifespan decreases a lot.
Therefore, indoor air conditioning can not only extend the life of the equipment, but also reduce the outlet temperature.
If a soundproof cover is installed, the door of the soundproof cover must be opened in summer. As far as I know, domestic soundproof covers have no sound insulation effect at all. Instead, they increase the ambient temperature, causing the temperature of the inhaled air to be higher and the outlet temperature to be extremely high.
, Reduce pipeline pressure loss and other pressure losses as much as possible
, Tell you an empirical formula, the outlet temperature of the three-blade Roots blower, the inlet temperature + () * pressure
The unit of pressure here is meters of water column
For example, if the water level is meters, the pressure loss of pipe loss and diaphragm loss (sewage plant aeration pipe diaphragm) is meters, and the ambient temperature is degrees, then the outlet temperature will be in degrees.
So from this formula you can understand the significance of reducing the inlet temperature and outlet pressure. As far as I know, in many fans equipped with soundproof covers, the inlet temperature exceeds 10 degrees Celsius in summer.
Ask why it is necessary to install a safety valve at the outlet of the Roots blower?
Answer There is an essential difference in the working principles between Roots blowers and centrifugal fans. The centrifugal fan relies on the rotation of the impeller to transfer energy to the air, causing the air to carry energy and move in a certain direction. Ultimately, what we feel is the moving wind, even if the fan outlet is completely blocked (in fact, when starting the centrifugal fan, the outlet should be turned off. air outlet) will not cause damage to the fan. The Roots blower relies on the structural relationship of the cyclone to squeeze the air out of the fan cavity, so it has a very high pressure head. In order to ensure safety, especially the sealing of the Roots blower, a safety valve is installed on the blower outlet.
Ask what is the relationship between pressure and current of Roots blower?
Answer It can be considered that the pressure of Roots blower is related to the size of the current. At the same speed and voltage, the greater the power of the Roots blower, the greater the pressure it generates, and the power voltage and current, that is to say, at the same speed and voltage, the greater the current, the greater the power. The greater the pressure, the greater the pressure
What is the best way to solve the broken V-belt of Roots blower?
Answer: First, the Roots blower must be started without load and loaded after startup.
Second, be careful to prevent the V-belt from slipping, otherwise the temperature will rise rapidly and the rubber of the V-belt will age and break.
Third, the pulleys of the motor and the fan must be parallel. In addition, the diameter of the pulleys also determines the life of the V-belt. When processing, try to make the diameter as large as possible.
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